New Russian 91N6E radar is next evolution of the oldest 64N6E Big Bird/Thombstone surveillance radar and developed for SA-21 'Growler' (S-400 'Triumph' in Russian designation) SAM system. The 91N6E is fully digital 3-D radar, which has range 600km and can display up to 300 targets simultaneously. The radar is placed in two vans, towed by MZKT-7930 tractor. This is high mobile radar, its deployment time 5 minutes only. Crew consist of 4 men.